RSpec / FactoryGirl - How to pass parameters in a request specification

I have a Rails API built with soothing routes. I am trying to pass parameters for a post request specification but I am facing some problems.

In my application, the user has a lot of timelines and the timeline has a lot of records. I can correctly create the timeline with the post request by following these steps:

post '/timelines', '{ "timeline": { "title":"My timeline", "body":"My timeline body"}}', @token_header

      

        
        
        
      

    

The problem I have is when I need to transfer more than just a string, i.e. an image. My input model has an attribute image

, but I can't figure out how to navigate to the parameters.

I have the following test that illustrates what I want to do. As you can see, I have declared some entry_attributes, but cannot figure out how to pass them correctly, as with the timeline parameters .:

    context 'POST /timelines/:id/entries' do
          it 'creates an entry for the given timeline' do
            entry_attr = FactoryGirl.attributes_for(:entry)
            post "/timelines/#{@timeline.id}/entries", {}, @token_header

            expect(response.status).to eq 201
          end
    end

      

        
        
        
      

    

Any help is greatly appreciated ...